Example usage for java.security KeyPairGenerator generateKeyPair

Introduction

In this page you can find the example usage for java.security KeyPairGenerator generateKeyPair.

Prototype

public KeyPair generateKeyPair()

Source Link

Document

Generates a key pair.

Usage

From source file:org.candlepin.CRLWriteBenchmark.java

@Setup(Level.Trial)
public void buildMassiveCRL() throws Exception {
    issuer = new X500Name("CN=Test Issuer");

    KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");

    generator.initialize(2048);/*  w w  w . jav a 2s . c o m*/
    KeyPair keyPair = generator.generateKeyPair();

    bc = new BouncyCastleProvider();
    signer = new JcaContentSignerBuilder("SHA256WithRSAEncryption").setProvider(bc).build(keyPair.getPrivate());

    X509v2CRLBuilder crlBuilder = new X509v2CRLBuilder(issuer, new Date());
    crlBuilder.addExtension(X509Extension.authorityKeyIdentifier, false,
            new AuthorityKeyIdentifierStructure(keyPair.getPublic()));
    /* With a CRL number of 127, incrementing it should cause the number of bytes in the length
     * portion of the TLV to increase by one.*/
    crlBuilder.addExtension(X509Extension.cRLNumber, false, new CRLNumber(new BigInteger("127")));

    for (int i = 0; i < 2000000; i++) {
        crlBuilder.addCRLEntry(new BigInteger(String.valueOf(i)), new Date(), CRLReason.unspecified);
    }

    X509CRLHolder holder = crlBuilder.build(signer);
    X509CRL crl = new JcaX509CRLConverter().setProvider(bc).getCRL(holder);

    crlFile = File.createTempFile("crl", ".der");
    System.out.println("\nWrote test crl to " + crlFile.getAbsolutePath());
    FileUtils.writeByteArrayToFile(crlFile, crl.getEncoded());
}

From source file:org.apache.abdera2.common.security.DHBase.java

private void init(BigInteger p, BigInteger g, int l, byte[] key)
        throws NoSuchAlgorithmException, InvalidAlgorithmParameterException, InvalidKeySpecException {
    DHParameterSpec spec = new DHParameterSpec(p, g, l);
    KeyPairGenerator keypairgen = KeyPairGenerator.getInstance("DH");
    keypairgen.initialize(spec);//  www .j a v a2s.c o m
    keyPair = keypairgen.generateKeyPair();
    publicKey = decode(key);
}

From source file:org.xdi.oxauth.model.crypto.signature.ECDSAKeyFactory.java

public ECDSAKeyFactory(SignatureAlgorithm signatureAlgorithm, String dnName) throws InvalidParameterException,
        NoSuchProviderException, NoSuchAlgorithmException, InvalidAlgorithmParameterException,
        SignatureException, InvalidKeyException, CertificateEncodingException {
    if (signatureAlgorithm == null) {
        throw new InvalidParameterException("The signature algorithm cannot be null");
    }// w w w  .ja va  2s  .c o  m

    ECParameterSpec ecSpec = ECNamedCurveTable.getParameterSpec(signatureAlgorithm.getCurve());

    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("ECDSA", "BC");
    keyGen.initialize(ecSpec, new SecureRandom());

    KeyPair keyPair = keyGen.generateKeyPair();
    JCEECPrivateKey privateKeySpec = (JCEECPrivateKey) keyPair.getPrivate();
    JCEECPublicKey publicKeySpec = (JCEECPublicKey) keyPair.getPublic();

    BigInteger x = publicKeySpec.getQ().getX().toBigInteger();
    BigInteger y = publicKeySpec.getQ().getY().toBigInteger();
    BigInteger d = privateKeySpec.getD();

    ecdsaPrivateKey = new ECDSAPrivateKey(d);
    ecdsaPublicKey = new ECDSAPublicKey(signatureAlgorithm, x, y);

    if (StringUtils.isNotBlank(dnName)) {
        // Create certificate
        GregorianCalendar startDate = new GregorianCalendar(); // time from which certificate is valid
        GregorianCalendar expiryDate = new GregorianCalendar(); // time after which certificate is not valid
        expiryDate.add(Calendar.YEAR, 1);
        BigInteger serialNumber = new BigInteger(1024, new Random()); // serial number for certificate

        X509V1CertificateGenerator certGen = new X509V1CertificateGenerator();
        X500Principal principal = new X500Principal(dnName);

        certGen.setSerialNumber(serialNumber);
        certGen.setIssuerDN(principal);
        certGen.setNotBefore(startDate.getTime());
        certGen.setNotAfter(expiryDate.getTime());
        certGen.setSubjectDN(principal); // note: same as issuer
        certGen.setPublicKey(keyPair.getPublic());
        certGen.setSignatureAlgorithm("SHA256WITHECDSA");

        X509Certificate x509Certificate = certGen.generate(privateKeySpec, "BC");
        certificate = new Certificate(signatureAlgorithm, x509Certificate);
    }
}

From source file:org.xdi.oxauth.model.crypto.signature.RSAKeyFactory.java

public RSAKeyFactory(SignatureAlgorithm signatureAlgorithm, String dnName)
        throws InvalidParameterException, NoSuchProviderException, NoSuchAlgorithmException, SignatureException,
        InvalidKeyException, CertificateEncodingException {
    if (signatureAlgorithm == null) {
        throw new InvalidParameterException("The signature algorithm cannot be null");
    }//from   w ww.  j  ava  2 s. c  om

    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA", "BC");
    keyGen.initialize(2048, new SecureRandom());

    KeyPair keyPair = keyGen.generateKeyPair();

    JCERSAPrivateCrtKey jcersaPrivateCrtKey = (JCERSAPrivateCrtKey) keyPair.getPrivate();
    JCERSAPublicKey jcersaPublicKey = (JCERSAPublicKey) keyPair.getPublic();

    rsaPrivateKey = new RSAPrivateKey(jcersaPrivateCrtKey.getModulus(),
            jcersaPrivateCrtKey.getPrivateExponent());

    rsaPublicKey = new RSAPublicKey(jcersaPublicKey.getModulus(), jcersaPublicKey.getPublicExponent());

    if (StringUtils.isNotBlank(dnName)) {
        // Create certificate
        GregorianCalendar startDate = new GregorianCalendar(); // time from which certificate is valid
        GregorianCalendar expiryDate = new GregorianCalendar(); // time after which certificate is not valid
        expiryDate.add(Calendar.YEAR, 1);
        BigInteger serialNumber = new BigInteger(1024, new Random()); // serial number for certificate

        X509V1CertificateGenerator certGen = new X509V1CertificateGenerator();
        X500Principal principal = new X500Principal(dnName);

        certGen.setSerialNumber(serialNumber);
        certGen.setIssuerDN(principal);
        certGen.setNotBefore(startDate.getTime());
        certGen.setNotAfter(expiryDate.getTime());
        certGen.setSubjectDN(principal); // note: same as issuer
        certGen.setPublicKey(keyPair.getPublic());
        certGen.setSignatureAlgorithm(signatureAlgorithm.getAlgorithm());

        X509Certificate x509Certificate = certGen.generate(jcersaPrivateCrtKey, "BC");
        certificate = new Certificate(signatureAlgorithm, x509Certificate);
    }
}

From source file:com.buzzcoders.security.cryptoutils.asymmetric.AbstractAsymmetricEncryptionModule.java

public KeyPair generateKeyPair(int keyLength) {
    KeyPair kp = null;/*from  ww w.j a  va  2 s.  c o  m*/
    try {
        KeyPairGenerator kpg = KeyPairGenerator.getInstance(getAlgorithm());
        kpg.initialize(keyLength);
        kp = kpg.generateKeyPair();
    } catch (NoSuchAlgorithmException e) {
        LOG.error("Error generating the key pair.", e);
    }
    return kp;
}

From source file:org.apache.abdera2.common.security.DHBase.java

private void init() throws NoSuchAlgorithmException, InvalidAlgorithmParameterException,
        InvalidParameterSpecException, InvalidKeySpecException {
    AlgorithmParameterGenerator pgen = AlgorithmParameterGenerator.getInstance("DH");
    pgen.init(512);/*w w w . j  a  v a  2  s . c  o m*/
    AlgorithmParameters params = pgen.generateParameters();
    DHParameterSpec dhspec = (DHParameterSpec) params.getParameterSpec(DHParameterSpec.class);
    KeyPairGenerator keypairgen = KeyPairGenerator.getInstance("DH");
    keypairgen.initialize(dhspec);
    keyPair = keypairgen.generateKeyPair();
    p = dhspec.getP();
    g = dhspec.getG();
    l = dhspec.getL();
}

From source file:org.apache.sshd.common.config.keys.loader.pem.PKCS8PEMResourceKeyPairParserTest.java

@Test // see SSHD-760
public void testPkcs8() throws IOException, GeneralSecurityException {
    KeyPairGenerator generator = SecurityUtils.getKeyPairGenerator(algorithm);
    if (keySize > 0) {
        generator.initialize(keySize);//from w w w. j a v a 2 s  . c om
    }
    KeyPair kp = generator.generateKeyPair();

    try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
        Collection<Object> items = new ArrayList<>();
        PrivateKey prv1 = kp.getPrivate();
        items.add(new PEMItem(prv1.getEncoded(), "PRIVATE KEY"));
        byte[] bytes = PEMUtil.encode(items);
        os.write(bytes);
        os.close();

        try (ByteArrayInputStream bais = new ByteArrayInputStream(os.toByteArray())) {
            KeyPair kp2 = SecurityUtils.loadKeyPairIdentity(getCurrentTestName(), bais, null);

            assertEquals("Mismatched public key", kp.getPublic(), kp2.getPublic());
            assertEquals("Mismatched private key", prv1, kp2.getPrivate());
        }
    }
}

From source file:jef.tools.security.EncrypterUtil.java

/**
 * ?KEY/*from w w  w .  j  a v  a2 s . co  m*/
 * 
 * @param algom
 *            ? DSA RSA
 * @return
 */
public static final KeyPair generateKeyPair(String algom) {
    try {
        java.security.KeyPairGenerator keygen = java.security.KeyPairGenerator.getInstance(algom);
        SecureRandom secrand = new SecureRandom();
        secrand.setSeed("\n".getBytes()); // ??
        //  512  1024  64 ?
        keygen.initialize(1024, secrand); // ??
        // keygen.initialize(512);
        KeyPair keys = keygen.generateKeyPair(); // ?
        return keys;
    } catch (GeneralSecurityException e) {
        throw new RuntimeException(e);
    }
}

From source file:SecureConnection.java

private byte[] getPublicKeyStep2(DHParameterSpec dhParamSpec) throws Exception {
    KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("DH");
    keyPairGen.initialize(dhParamSpec);//from  ww  w.  j  a  v  a 2  s  . c om
    KeyPair keyPair = keyPairGen.generateKeyPair();
    this.keyAgree = KeyAgreement.getInstance("DH");
    this.keyAgree.init(keyPair.getPrivate());
    return keyPair.getPublic().getEncoded();
}

From source file:org.metaeffekt.dcc.agent.AuthenticationKeyGenerator.java

private KeyPair generateKey() throws NoSuchAlgorithmException {
    final KeyPairGenerator keyGenerator = KeyPairGenerator.getInstance(KEY_ALGORITHM);
    keyGenerator.initialize(DEFAULT_KEY_SIZE);

    return keyGenerator.generateKeyPair();
}